MDH recommends wearing a high-quality mask to help limit COVID-19, including variants like Omicron. Examples of high-quality masks include N95 or KN95 masks, which are very good at blocking droplets. If you do not have this type of mask, wear a mask with two or more layers of tightly woven fabric. You can also layer a disposable mask under a cloth mask to increase effectiveness. The cloth mask should press the edges of the disposable mask snugly against your face. Do not wear face coverings made of thinner, loosely woven, or single-layer fabric such as certain types of masks, scarves, neck gaiters, or bandannas. They are not as effective for blocking droplets that come out when speaking, coughing, or sneezing. If you wear a scarf or neck gaiter for warmth, also wear a mask underneath it. Any masks that incorporate a valve that is designed to facilitate easy exhaling, mesh masks, or masks with openings, holes, visible gaps in the design or material, or vents are NOT sufficient face coverings because they allow droplets to be released from the mask.